Improvement in machines for stripping file-blanks



WITNESSES- W. T. NICHOLSON.

MACHiITES FDR STRIPPING FILE-BLANKS. No; 177,073. Patented May 9,1876.

I mun I INVENTOR- N-PEYERS FN6TO LITHOGRAPHEK WASHINGTON, D U,

WILLIAM T. nrouoLson, OF PROVIDENCE, RHODE ISLAND mcnonson FILE coMPANY,on SAME PLACE.

PATENT IMPROVEMENT IN MAH|NES FOR STRIPPING FILE BhANKS.

Specification forming part of Letters Patent no. 177,073, dated May 9,i876 appliance filed December 16, 1875. I

To all whom it may coa'iceln Be it known that I, WILLIAM T. NIcHoL- soN,0f the city and county of Providence, in the State of Rhode Island, haveinvented oertain new and useful Improvements in Machines for StrippingFile-Blanks; and I do herewith. This part of myinvention consists,first, in the peculiar arrangement of a reversible bed for holding thefile-blank; second, in the application of two laterally-reciprocatingstripping-files in opposite directions to two file-blanks secured to areversible bed third,

in the peculiar device by which the reversiblebed is connected with anddisconnected from the driving mechanism, as will be more fully describedhereinafter.

Figure 1 is a top view of my improved filestripping machine, parts ofthree other machines being shown as connected with the same drivingdevice. Fig. 2 is a front elevation of the same, showing the meansemployed for reciprocating the stripper-bars. Fig. 3 is a side view ofthe machine.

Similar letters of reference indicate corresponding parts.

In the drawings, a is the reversible reciproeating bed, to which twofile-blanks are secured, one upon its upper and the other upon its lowerface, so that two file-blanks are operated upon at the same time, eitherby subjecting one blank to a roughing-stripper and one to a smoothing orfinishing stripper, so that the file-blank is first operated upon by theone and then by the other stripping-file; or two stripper-files may beused, by each of which the operation is completed, and thus twofile-blanks be stripped or draw-filed simultaneously. I) is a reversiblecoupling secured to the end of the bed a. This coupling engag-es over aprojecting hm on the plate 0,

which, in Fig. 1, is shown asia square plate with which four machinesare connected by couplings b b b b. In place of the square plate 0, asshown, a circular plate having a similar rim around its periphery may beused; and four or more machines be driven from one central shaft. Theplate 0 is carried on the crank-pin secured to the crank d at suchdistance from the center as will produce the length of reciprocationrequired for the fileblanks to be stripped. e is the upper and f thelower stripping-bar, to'which the stripping-files are secured-in theusual manner. A lateral reciprocating'movement is imparted to thesefiles through a cam or pinion, y, en gaging in the face-wheel h, securedto the shaft 6, to which the eccentrics K K are also secured. At eachrevolution of the main shaft the facewheel h is rotated one, two, ormore teeth, thus slowly rotating the shaft 2' and the eccentrics K K.The eccentrics K K are adjustable on the shaft, so that-they may be setto greater or less eccentric motion. The hinged levers Z Z, secured atthe fulcrum M M, are connected with the stripper-bars e and f, and alsowith the eccentrics K K. The rotary motion of the shaft 2' is thuschanged into reciprocating motion and transmitted to the stripper-bars.The two eccentrics are set, as shown in Fig. 2, in opposit directions,and thus the stripper-bars are made to move and reciprocate laterally inopposite directions.- By these means no lateral strain is exerted on thebed a, as the two strippers counteract'the strain of each other. Thestripper-bar f is supported by a roller secured to an arm of the hingedlever O, and is held firmly against the fileblank by a weight, g,suspended from the horizontal arm of the lever O, the pressure isincreased at the outward stroke or reciprocation of the bed a by the rod1", secured to'an eccentric rotating with the main driving-shaft, whichrod 1" passes through the friction-clutch p, and thus, by frictionalcontact, pushes against the lever 0, and increases the pressure of thestripping-files against the fileblanks, While the same frictionalcontact di-' minishes the pressure at the return stroke, by

, ASSIGNOR TO pulling on the lever O in the opposite direction. Thisfeature of the machine is the same which is described and claimed inanother application for Letters Patent of even date herewith. Oonnectedwith the horizontal arm of I the lever O is the arm 8 projecting forwardto the guide-block u, supporting a roller placed .into said guide-blocku. When the lower end of the lever O is moved forward, so that the pawlt-engages with the catch a, the arm sis also pushed forward and raisesthe connected end of the bed a, and disengages thecoupling b from theplate 0, and the stripper-bar f, and

' the bed a are lowered. The bed therefore will What I claim as myinvention, and desire to secure by Letters Patent, is-

1. The combination in a file-strippiugmachine of the reversible bed a,and the laterally-reciprocating stripping-files f and e, operzt tedsubstantially as and for the purpose set 2. The combination, with thereversible bed a, of the lever 0, weight g, and lever s, the

whole operating together as and for the purs pose specified.

3. The combination of the pinion g, face wheel h, and eccentrics K K,with the levers l l, for imparting lateral reciprocating motion tothestripping-files, as and forthe purpose described.

WILLIAM 'r. NICHOLSON.

Witnesses: V i I FRANK S. ARNOLD, J. G. B. WOODS.

